/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.polardbx.optimizer.core.rel;

import com.alibaba.polardbx.common.jdbc.ParameterContext;
import com.alibaba.polardbx.common.utils.Pair;
import com.alibaba.polardbx.optimizer.context.ExecutionContext;
import com.alibaba.polardbx.rule.TableRule;

import java.util.Map;

/**
 * @author lingce.ldm 2017-12-11 21:06
 */
public class EmptyShardProcessor extends ShardProcessor {
    protected EmptyShardProcessor(TableRule TableRule) {
        super(TableRule);
    }

    @Override
    Pair<String, String> shard(Map<Integer, ParameterContext> param, ExecutionContext executionContext) {
        throw new UnsupportedOperationException("EmptyShardProcessor does not support shard method.");
    }
}
